#!/usr/bin/env python
# -*- coding:utf-8 -*-

# file:do_const.py
# author:Jackiex
# datetime:2023/4/20 14:47
# software: PyCharm

"""
this is function  description 
"""

from const import PI


def calc_round_area(radius):
    return PI * (radius ** 2)


def main():
    print("round area: ", calc_round_area(2))


main()
